#include <stdio.h>
#include <string.h>

int main(){

    char* s = "123456789";
    char s2[] = {'h','e','\0'};

    printf("%s\n", s2);

    printf("%d\n", sizeof(s));// 指针s的长度
    printf("%x\n", s);
    printf("%c\n", s[5]);

    printf("%d", strlen(s));

    return 0;
}